NCEP FNL Operational Model Global Tropospheric Analyses, July 1976 to April 1997 

The Final (FNL) global tropospheric analyses archived here were produced by NCEP's Global Forecast System (GFS), which was run operationally at 12-hour intervals to make multiple-day weather forecasts, from July 1976 through mid-April 1997.  FNLs are analyses that are produced after the model has completed the forecast cycle, and they include the most complete set of observations available for a given cycle.  The FNL from a given cycle, which is the best available analysis, is then used in the initialization of the next cycle.


FNL Data are available on pairs of 2.5-degree hemispheric grids (North and South) at the Earth's surface, twelve vertical levels from 1000 millibars up to 50 millibars, the tropopause, boundary and some sigma layers, and a few other levels.  Parameters include surface pressure, sea level pressure, geopotential height, temperature, sea surface temperature, potential temperature, relative humidity, snow depth (weekly, Northern Hemisphere only) precipitable water, u- and v- winds, and vertical motion.

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Temporal Range

  • Begin:  1976-07-01T0000+00
    End:  1997-03-31T1200+00

Keywords

Resource Type dataset
Temporal Range Begin 1976-07-01T0000+00
Temporal Range End 1997-03-31T1200+00
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : MRF/AVN/GDAS CHANGES SINCE 1991
Additional Information N/A
Resource Format NCEP ON84
WMO GRIB1
Standardized Resource Format GRIB
OTHER
Asset Size 17669.687 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Publisher NSF National Center for Atmospheric Research
Publication Date 1980-01-11
Digital Object Identifier (DOI) https://doi.org/10.5065/D6K07288
Alternate Identifier d082000
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-09T01:19:19Z
Metadata Record Identifier edu.ucar.gdex::d082000
Metadata Language eng; USA
Suggested Citation National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce. (1980). NCEP FNL Operational Model Global Tropospheric Analyses, July 1976 to April 1997. NSF National Center for Atmospheric Research. https://doi.org/10.5065/D6K07288. Accessed 09 October 2025.

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